临近水库隧道地下水排放控制措施研究

Research on the Groundwater Discharge Control Measures in Adjacent Reservoir Tunnel

分析对比了现有隧道地下水的处理方法——冻结法和压注法的施工原理及注意事项。以厦门海新2号隧道为例,从防水、排水、截堵水措施3方面研究讨论了近水库隧道的地下水处理方法。建议隧道采用超前小导管注浆形成注浆圈堵水;封闭渗水在初期支护和二衬间流动,保证初期支护与二衬之间密贴进行防水;在初期支护与防水板间设纵环向盲沟,隧道边墙底部设排水管进行排水。

This paper analyzes and compares the construction principle and points for attention of the existing tunnel groundwater freezing method and injection method. Taking Xiamen Haixin No. 2 tunnel as an example,from three aspects of waterproof,drainage,water plugging measures to discuss reservoir tunnel groundwater treatment method. It is suggested that the tunnel applies advanced conduit grouting to form grouting ring for water plugging,to close seepage flows between the initial support and second lining to assure the sealing of the initial support and the second lining for waterproof. The longitudinal ring blind ditch is set in the initial support and the waterproofing board,and the drainpipe is set in the bottom wall for drainage.